/**
 * Copyright © 2019 IBM Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "callouts.hpp"

#include <phosphor-logging/lg2.hpp>

#include <algorithm>

namespace openpower
{
namespace pels
{
namespace src
{

Callouts::Callouts(Stream& pel)
{
    pel >> _subsectionID >> _subsectionFlags >> _subsectionWordLength;

    size_t currentLength = sizeof(_subsectionID) + sizeof(_subsectionFlags) +
                           sizeof(_subsectionWordLength);

    while ((_subsectionWordLength * 4) > currentLength)
    {
        _callouts.emplace_back(new Callout(pel));
        currentLength += _callouts.back()->flattenedSize();
    }
}

void Callouts::flatten(Stream& pel) const
{
    pel << _subsectionID << _subsectionFlags << _subsectionWordLength;

    for (auto& callout : _callouts)
    {
        callout->flatten(pel);
    }
}

void Callouts::addCallout(std::unique_ptr<Callout> callout)
{
    bool shouldAdd = true;

    // Check if there is already a callout for this FRU
    auto it = std::ranges::find_if(_callouts, [&callout](const auto& c) {
        return *callout == *c;
    });

    // If the callout already exists, but the new one has a higher
    // priority, change the existing callout's priority to this
    // new value and don't add the new one.
    if (it != _callouts.end())
    {
        if (*callout > **it)
        {
            (*it)->setPriority(callout->priority());
        }
        shouldAdd = false;
    }

    if (shouldAdd)
    {
        if (_callouts.size() < maxNumberOfCallouts)
        {
            _callouts.push_back(std::move(callout));

            _subsectionWordLength += _callouts.back()->flattenedSize() / 4;
        }
        else
        {
            lg2::info("Dropping PEL callout because at max");
        }
    }

    std::ranges::sort(_callouts,
                      [](const auto& c1, const auto& c2) { return *c1 > *c2; });
}

} // namespace src
} // namespace pels
} // namespace openpower